New York Times, August 28, 1910, p. 10 ("Brooklyn's Apartment House Development Active on the Heights and Prospect Park")
As noted in the article, after focusing exclusively on apartment houses, Louis Bonert broke into single-family home construction in the first decade of the last century. And he did so in a characteristically big way: according to the Park Slope Historic District designation report, Bonert developed the entire south side of First Street between 8th Avenue and Prospect Park West:
The article notes that about the same time, Bonert constructed an entire block of buildings on 8th Avenue, between 4th & 5th Streets:
Bonert's 4-family "single flat" apartment houses were usually about 20 feet in width. His "double flat" buildings (two apartments per floor) began at 30 feet in width, and progressed through 36 to 46 foot configurations. These buildings in 8th Avenue are a full 50 feet wide, and very deep as well:
After spending weeks with Mr. Bonert on the blog, we've quite nearly reached the end of the line. As far as we know right now, these were the final buildings constructed by Louis Bonert in Park Slope. It remains only to relate what little else we know about him in the next post.